US7745527B2 - Polyethylene-syndiotactic polypropylene composition and processing thereof - Google Patents

Polyethylene-syndiotactic polypropylene composition and processing thereof Download PDF

Info

Publication number
US7745527B2
US7745527B2 US11/639,898 US63989806A US7745527B2 US 7745527 B2 US7745527 B2 US 7745527B2 US 63989806 A US63989806 A US 63989806A US 7745527 B2 US7745527 B2 US 7745527B2
Authority
US
United States
Prior art keywords
syndiotactic polypropylene
melting peak
polyethylene wax
minor
original
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/639,898
Other languages
English (en)
Other versions
US20080143013A1 (en
Inventor
Joseph M. Schardl, Jr.
Lu Ann Kelly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fina Technology Inc
Original Assignee
Fina Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fina Technology Inc filed Critical Fina Technology Inc
Assigned to FINA TECHNOLOGY, INC. reassignment FINA TECHNOLOGY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHARDL JR., JOSPEH M., KELLY, LU ANN
Priority to US11/639,898 priority Critical patent/US7745527B2/en
Priority to PCT/US2007/087124 priority patent/WO2008076723A2/en
Priority to CNA2007800458338A priority patent/CN101563373A/zh
Priority to CA002665029A priority patent/CA2665029A1/en
Priority to JP2009541537A priority patent/JP2010513600A/ja
Priority to MX2009003419A priority patent/MX2009003419A/es
Priority to EP07865527A priority patent/EP2091977A2/de
Priority to KR1020097012376A priority patent/KR20090087482A/ko
Assigned to FINA TECHNOLOGY, INC. reassignment FINA TECHNOLOGY, INC. CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR NAME, PREVIOUSLY RECORDED AT REEL 018719, FRAME 0825. Assignors: SCHARDI, JR., JOSEPH M., KELLY, LU ANN
Publication of US20080143013A1 publication Critical patent/US20080143013A1/en
Priority to US12/751,355 priority patent/US20100190909A1/en
Publication of US7745527B2 publication Critical patent/US7745527B2/en
Application granted granted Critical
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/12—Applications used for fibers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/10—Peculiar tacticity
    • C08L2207/12—Syndiotactic polypropylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethylene

Definitions

  • This invention relates to syndiotactic polypropylenes incorporating small amounts of polyethylene waxes and methods of processing such polypropylenes to produce a polypropylene product.
  • Stereoregular polypropylene in the form of propylene homopolymers or propylene co-polymers incorporating small amounts of other alpha olefins such as ethylene or butylene as co-monomers can be processed to form products such as films, fibers and molded products.
  • stereoregular polypropylenes perhaps isotactic polypropylene is most widely used.
  • isotactic polypropylene can be used in the production of relatively thin films in which the polypropylene is heated and then extruded through slotted dies and subject to biaxial orientation by stretching the film in both a longitudinal and a transverse direction.
  • Isotactic polypropylene can also be extruded through small orifices to produce fibers or may be subjected to blow molding or injected into constriction molds to produce molded products such as containers and solid shaped items.
  • isotactic polypropylene is characterized in terms of the methyl group attached to the tertiary carbon atoms of the successive propylene monomer units lying on the same side of the main chain of the polymer. That is, the methyl groups are characterized as being all above or below the polymer chain.
  • Isotactic polypropylene can be illustrated by the following chemical formula:
  • Stereoregular polymers such as isotactic and syndiotactic polypropylene
  • stereoregular polymers such as isotactic and syndiotactic polypropylene
  • isotactic and syndiotactic polypropylene can be characterized in terms of the Fisher projection formula
  • the stereochemical sequence of isotactic polypropylene as shown by Formula (1) can be characterized as follows:
  • Bovey's NMR nomenclature for an isotactic pentad is . . . mmmm . . . with each “m” representing a “meso” dyad, or successive methyl groups on the same side of the plane of the polymer chain. As is known in the art, any deviation or inversion in the structure of the chain lowers the degree of isotacticity and crystallinity of the polymer.
  • syndiotactic propylene polymers are those in which the methyl groups attached to the tertiary carbon atoms of successive monomeric units in the polymer chain lie on alternate sides of the plane of the polymer.
  • Syndiotacticity can be characterized in terms of the syndiotactic dyad and pentad rrrr in which each “r” represents a racemic dyad.
  • Syndiotactic polymers are semi-crystalline and, like the isotactic polymers, are essentially insoluble in xylene. This crystallinity distinguishes both syndiotactic and isotactic polymers from an atactic polymer, which is non-crystalline and highly soluble in xylene.
  • An atactic polymer exhibits no regular order of repeating unit configurations in the polymer chain and forms essentially a waxy product.
  • a processable polypropylene composition comprising a mixture of a syndiotactic polypropylene as the predominant component and a polyethylene wax as a relatively minor component.
  • the syndiotactic polypropylene is characterized by a designated recrystallization temperature, an original minor melting peak, and an original major melting peak occurring at a higher temperature than the original minor melting peak.
  • the polyethylene wax is present in an admixture with the syndiotactic polypropylene in an amount to provide a recrystallization temperature of the admixture that is greater than the recrystallization temperature of the syndiotactic polypropylene alone.
  • the polyethylene wax also provides for a minor melting peak and a major melting peak of the mixture, which has a temperature difference which is lower than the temperature difference between the original minor melting peak and the original major melting peak of the syndiotactic polypropylene alone.
  • the temperature difference between the minor and major melting peaks of the formulation incorporating the polyethylene wax is less than the difference between the original minor and major melting peaks, that is, without the addition of the polyethylene wax, by an increment of at least 2° C.
  • the polyethylene wax which has a molecular weight that is less than the molecular weight of the syndiotactic polypropylene, is present in an amount to provide an enhancement in the recrystallization temperature that is at least 5% greater than the recrystallization temperature of the syndiotactic polypropylene alone.
  • the processable polypropylene composition of the present invention is also characterized in terms of the slope of the curve defined by the original minor melting peak of the syndiotactic polypropylene alone and the minor melting peak of the admixture of polyethylene wax and the syndiotactic polypropylene. This slope is greater than the slope of the curve defined by the original major melting peak of the syndiotactic polypropylene and the major melting peak of the admixture of syndiotactic polypropylene and the polyethylene wax.
  • the processable composition is characterized in terms of the temperature difference between the recrystallization temperature of the mixture and the minor melting peak of the mixture, which is less than the difference between the original recrystallization temperature and the original minor melting peak by an increment of at least 1° C.
  • the polyethylene wax is present in the admixture in an amount of at least 0.1 wt. % and ranging up to 10 weight percent to provide an amount within the range of 0.1-10 wt. %.
  • a process for the production of a polypropylene product employing a polyethylene-syndiotactic polypropylene composition as described above.
  • the polyethylene-syndiotactic polypropylene composition is heated to a temperature in excess of the major melting peak of the composition to provide a plastic mass of the syndiotactic polypropylene incorporating a small amount of polyethylene.
  • This plastic mass is processed to a desired configuration to provide a preform for the product and then cooled to a temperature below the recrystallization temperature of the admixture to provide the product.
  • the plastic mass may be processed by extruding it through a slotted die system to provide a polypropylene film.
  • the plastic mass may be blow molded or introduced into a confining mold and then cooled to a temperature below the recrystallization temperature to produce a molded product, or the plastic mass may be extruded through a fiber die orifice to produce an elongated fiber preform. The preform is then cooled to a temperature below the recrystallization temperature and then stressed by elongation to form the final fiber product.
  • FIG. 1 is a graphical illustration of increase in recrystallization temperature and decrease in incremental difference between minor and major melting peaks as a function of polyethylene wax concentration in syndiotactic polypropylene;
  • FIG. 2 is a graphical illustration of the major melting peak and the minor melting peak as a function of the polyethylene wax concentration in the syndiotactic polypropylene mixture.
  • syndiotactic polypropylene employed in carrying out the present invention can be characterized in terms of the microcrystalline characteristics and the rheological properties that are significant in the processability of the polymer product.
  • the microstructure and rheological products of syndiotactic polypropylene are described in U.S. Pat. No. 6,184,326 to Razavi et al.
  • syndiotactic polypropylene can be characterized in terms of its molecular weight and molecular weight distribution, M w /M n , as defined by the ratio of the weight average molecular weight, M w , to the number average molecular weight, M n , and it microstructure in terms of the percent of racemic dyads, indicated by r, racemic triads, indicated by rr, and racemic pentads, indicated by rrrr.
  • propylene can be polymerized to produce syndiotactic polypropylene to peak temperatures characterized in terms of a lower melting point, identified as Tm1, and a higher melting point, identified as Tm2 in the Razavi patent.
  • Tm1 a lower melting point
  • Tm2 a higher melting point
  • the syndiotactic polypropylene employed in the present invention may have a relatively high syndiotacticity as measured by the percent of the racemic pentads of the syndiotactic polypropylene.
  • the microstructure is characterized by at least 70% racemic pentads, and more specifically at least 75% racemic pentads and further at least 80% racemic pentads.
  • the molecular weight of the syndiotactic polypropylene employed in the present invention can be of any suitable value, but it normally will be substantially higher than the polyethylene wax that is mixed with the syndiotactic polypropylene.
  • the molecular weight distribution may be broad or narrow, depending upon the ultimate use to which the polymer is put.
  • the molecular weight distribution can be controlled by selection of the particular transition metal used in the syndiospecific catalyst or through the use of two different syndiospecific metallocenes as disclosed in the aforementioned U.S. Pat. No. 6,184,326 to Razavi et al.
  • the polyethylene wax incorporated into the syndiotactic polypropylene normally will be present in an amount of at least 0.1 wt. %, and alternatively in an amount of at least 1 wt. %.
  • the polyethylene wax concentration may vary up to a value of about 10 wt. % of the syndiotactic polypropylene, but normally will be used in somewhat lower amounts of about 1 wt. %.
  • the amount of syndiotactic polypropylene can be varied in order to produce a desired rheological characteristic of the syndiotactic polypropylene-polyethylene wax mixture.
  • the polyethylene wax as described previously will normally have a substantially lower molecular weight than the molecular weight of the syndiotactic polypropylene. Normally the molecular weight of the polyethylene wax will be no more than 5,000. Usually the molecular weight will vary within the range of 1,000-3,000.
  • the solid polymer product In processing the syndiotactic polypropylene-polyethylene wax mixture, the solid polymer product, as it is progressively heated, reaches a first lower temperature melting peak, characterized herein as the minor melting peak, and upon further heating reaches a second, higher temperature melting peak, characterized herein as the major melting peak. As the molten polymer product is then cooled, it reaches a recrystallization peak that is at a temperature significantly below the temperature of the minor melting peak.
  • the processing of the syndiotactic polypropylene-polyethylene wax mixture can be controlled and enhanced by bringing the minor and major melting peaks in closer proximity to one another than observed for the pure syndiotactic polypropylene and also by increasing the recrystallization peak to a value greater than that observed for the original or pure syndiotactic polypropylene, that is, the polypropylene without the addition of the polyethylene wax.
  • the syndiotactic polypropylene employed in the experimental work was highly crystalline, having >90% syndiotactic dyads and >75% syndiotactic pentads.
  • the syndiotactic polypropylene was produced by polymerization with a syndiospecific metallocene of the type disclosed in the aforementioned U.S. Pat. No. 6,184,326.
  • the polymer had a weight average molecular weight of about 170,000 and a number average molecular weight of about 35,000, providing a molecular weight distribution of 4.8.
  • the polyethylene wax employed in various concentrations in admixture with the syndiotactic polypropylene had a molecular weight of about 3,000 and a melting temperature of about 128° C.
  • the polyethylene wax was employed in compositions varying from 0.1 wt. % polyethylene wax to 5.0 wt. % polyethylene wax.
  • the percentage of polyethylene wax is determined based upon the mixture of the polyethylene and syndiotactic polypropylene.
  • the formulation containing 5.0 wt. % polyethylene incorporated 5 parts by weight of polyethylene and 95 parts by weight of syndiotactic polypropylene.
  • the polyethylene wax employed was employed in two forms. One was a micronized form having an average particle size of 7 microns, and the other in the form of prills averaging 200 micron particles.
  • the pure syndiotactic polypropylene and the polyethylene-syndiotactic polypropylene formulations were formed into plaques having a thickness of 0.05′′.
  • the characteristics of the formulations and the plaques thus formed are set forth in Table I.
  • Table I the four samples used are identified as samples 1, 2, 3 and 4, with sample 1 being the pure polypropylene. Column no. 1 indicates the concentration of polyethylene wax and column no. 2 indicates the nature of the wax used in the sample in question. In the third column, the haze of the 0.05 inch plaques is set forth.
  • the haze factor was determined according to ASTM Method D1003 (Procedure A).
  • the fourth column sets forth the relative injection speed in forming the plaques and the fifth column indicates the cooling time for the plaques in seconds.
  • the sixth column shows the total cycle time for producing the plaques in seconds.
  • Table II presents the rheological properties of the four samples identified in Table I.
  • the recrystallization temperature, T r , and the major, T 1 , and minor, T 2 temperature peaks in ° C. are shown respectively in the first three rows of data.
  • the fourth row indicates the difference between the major (T 1 ) and the minor (T 2 ) melting peaks for each of the samples 1, 2, 3 and 4.
  • the fifth row indicates the difference between T 2 and T r and the last row indicates the difference between T 1 and T r .
  • curve 2 is a plot of the incremental difference D between the major and minor melting peaks (T 1 -T 2 ) in ° C. plotted on the ordinate vs. the polyethylene concentration, P, plotted on the abscissa and curve 3 is a graph of the increase in recrystallization temperature IT r from the value of T r for sample 1 plotted on the ordinate vs. the polyethylene concentration, P.
  • curve 4 is a plot of the major melting peak, T 1 , plotted on the ordinate vs. the polyethylene concentration, P, plotted on the abscissa.
  • Curve 6 is a plot of the minor melting peak, T 2 , plotted on the ordinate vs. the polyethylene concentration, P, plotted on the abscissa.
  • the increase in the minor melting peak continues through the 5 wt. % polyethylene formulation, albeit with a decreasing slope. Accordingly, while greater amounts of polyethylene can be employed, up to 10 wt. %, the polyethylene content may be limited to 5 wt. %, and alternatively limited to 4 wt. % in order to prevent further degradation of clarity of the product as indicated by the increased haze factor shown in Table I.
  • broken lines 7 and 8 indicate the slope of the curve defined by the original minor melting peak of the syndiotactic polypropylene alone and the peaks as observed at 2 and 5 wt. %, respectively. In both cases, they are substantially greater than the slope of curve 4 , which is relatively flat.
  • the syndiotactic polypropylene-polyethylene wax mixture may be employed in accordance with the present invention to produce any suitable product.
  • the invention may be carried out to produce fibers, monolayer or multilayer films and molded products in either blow molding processes or constrictive molding processes.
  • the polyethylene-syndiotactic polypropylene composition is heated to a temperature in excess of the major melting peak to produce a molten or plastic mass of the composition, which can be further processed to a desired configuration.
  • the preform thus produced is then cooled to a temperature below the recrystallization temperature to provide the desired product.
  • This product may be further processed in a manner known to those skilled in the art in order to arrive at the desired product.
  • the present invention is particularly applicable to the production of polypropylene films and fibers.
  • Suitable procedures for producing fibers formed of the polyethylene wax-syndiotactic polypropylene composition of the present invention are disclosed in U.S. Pat. No. 6,416,699 to Gownder.
  • the syndiotactic polypropylene formulation is heated to a molten state, in this case in excess of the major melting temperature peak, and then extruded to form a fiber preform which is spun in a quench column and then drawn at any suitable draw ratio, typically within the range of 2-3.
  • the molten mass again heated to a temperature in excess of the major melting point peak, is extruded through a slotted die configuration and then processed, for example, in a suitable tenter frame procedure as disclosed in U.S. Pat. No. 6,641,913 to Hanyu et al.
  • the polyethylene wax-syndiotactic polypropylene formulation of the present invention may be used to form monolayer films, but typically will be used in multilayer films where the polyethylene-wax syndiotactic polypropylene film may be used to form a surface layer.
  • the polyethylene wax syndiotactic polypropylene formulation of the present invention can also be employed in various molding operations that may take the form of blow molding operations or constricted molding operations.
  • blow molding the plastic polyethylene-syndiotactic polypropylene composition is extruded through a suitable feed structure into a mold cavity of suitable configuration while attendantly supplying air or another gas so that the plastic syndiotactic polypropylene formulation is formed to a desired configuration within the mold structure.
  • Blow molding can be employed to produce hollow products of any suitable configuration, such as bottles as disclosed in U.S. Pat. No. 6,433,103 to Gunther et al. or automobile fuel tanks as disclosed in U.S. Pat. No.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
US11/639,898 2006-12-15 2006-12-15 Polyethylene-syndiotactic polypropylene composition and processing thereof Expired - Fee Related US7745527B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US11/639,898 US7745527B2 (en) 2006-12-15 2006-12-15 Polyethylene-syndiotactic polypropylene composition and processing thereof
EP07865527A EP2091977A2 (de) 2006-12-15 2007-12-12 Syndiotaktische polyethylen-polypropylenzusammensetzung und ihre verarbeitung
CNA2007800458338A CN101563373A (zh) 2006-12-15 2007-12-12 聚乙烯-间同立构聚丙烯组合物及其加工
CA002665029A CA2665029A1 (en) 2006-12-15 2007-12-12 Polyethylene-syndiotactic polypropylene composition and processing thereof
JP2009541537A JP2010513600A (ja) 2006-12-15 2007-12-12 ポリエチレン−シンジオタクチックポリプロピレン組成物およびこれらの加工
MX2009003419A MX2009003419A (es) 2006-12-15 2007-12-12 Composicion de polietileno-polipropileno sindiotactico y procesamiento de la misma.
PCT/US2007/087124 WO2008076723A2 (en) 2006-12-15 2007-12-12 Polyethylene-syndiotactic polypropylene composition and processing thereof
KR1020097012376A KR20090087482A (ko) 2006-12-15 2007-12-12 폴리에틸렌-신디오택틱 폴리프로필렌 조성물과 그 가공 방법
US12/751,355 US20100190909A1 (en) 2006-12-15 2010-03-31 Polyethylene-Syndiotactic Polypropylene Composition and Processing Thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/639,898 US7745527B2 (en) 2006-12-15 2006-12-15 Polyethylene-syndiotactic polypropylene composition and processing thereof

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/751,355 Division US20100190909A1 (en) 2006-12-15 2010-03-31 Polyethylene-Syndiotactic Polypropylene Composition and Processing Thereof

Publications (2)

Publication Number Publication Date
US20080143013A1 US20080143013A1 (en) 2008-06-19
US7745527B2 true US7745527B2 (en) 2010-06-29

Family

ID=39526166

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/639,898 Expired - Fee Related US7745527B2 (en) 2006-12-15 2006-12-15 Polyethylene-syndiotactic polypropylene composition and processing thereof
US12/751,355 Abandoned US20100190909A1 (en) 2006-12-15 2010-03-31 Polyethylene-Syndiotactic Polypropylene Composition and Processing Thereof

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/751,355 Abandoned US20100190909A1 (en) 2006-12-15 2010-03-31 Polyethylene-Syndiotactic Polypropylene Composition and Processing Thereof

Country Status (8)

Country Link
US (2) US7745527B2 (de)
EP (1) EP2091977A2 (de)
JP (1) JP2010513600A (de)
KR (1) KR20090087482A (de)
CN (1) CN101563373A (de)
CA (1) CA2665029A1 (de)
MX (1) MX2009003419A (de)
WO (1) WO2008076723A2 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010172A1 (en) * 1997-08-25 1999-03-04 Mobil Oil Corporation Multi-layer films with syndiotactic barrier layer containing a wax
US6184326B1 (en) 1992-03-20 2001-02-06 Fina Technology, Inc. Syndiotactic polypropylene
US6294235B1 (en) 1999-06-25 2001-09-25 Fina Research, S.A. Automobile fuel tank
US6416699B1 (en) 1999-06-09 2002-07-09 Fina Technology, Inc. Reduced shrinkage in metallocene isotactic polypropylene fibers
US6433103B1 (en) 2001-01-31 2002-08-13 Fina Technology, Inc. Method of producing polyethylene resins for use in blow molding
US6641993B1 (en) 2000-02-22 2003-11-04 Ortho Clinical Diagnostics, Inc. Aspirating and mixing of liquids within a probe tip
US20060020067A1 (en) 2004-04-15 2006-01-26 Patrick Brant Syndiotactic rich polyolefins
US20060211819A1 (en) 2004-03-17 2006-09-21 Dow Global Technologies Inc. Polymer blends from interpolymers of ethylene/alpha-olefins and flexible molded articles made therefrom

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6184326B1 (en) 1992-03-20 2001-02-06 Fina Technology, Inc. Syndiotactic polypropylene
WO1999010172A1 (en) * 1997-08-25 1999-03-04 Mobil Oil Corporation Multi-layer films with syndiotactic barrier layer containing a wax
US6416699B1 (en) 1999-06-09 2002-07-09 Fina Technology, Inc. Reduced shrinkage in metallocene isotactic polypropylene fibers
US6294235B1 (en) 1999-06-25 2001-09-25 Fina Research, S.A. Automobile fuel tank
US6641993B1 (en) 2000-02-22 2003-11-04 Ortho Clinical Diagnostics, Inc. Aspirating and mixing of liquids within a probe tip
US6433103B1 (en) 2001-01-31 2002-08-13 Fina Technology, Inc. Method of producing polyethylene resins for use in blow molding
US20060211819A1 (en) 2004-03-17 2006-09-21 Dow Global Technologies Inc. Polymer blends from interpolymers of ethylene/alpha-olefins and flexible molded articles made therefrom
US20060020067A1 (en) 2004-04-15 2006-01-26 Patrick Brant Syndiotactic rich polyolefins

Also Published As

Publication number Publication date
WO2008076723A2 (en) 2008-06-26
EP2091977A2 (de) 2009-08-26
WO2008076723A3 (en) 2008-08-21
JP2010513600A (ja) 2010-04-30
KR20090087482A (ko) 2009-08-17
CA2665029A1 (en) 2008-06-26
US20100190909A1 (en) 2010-07-29
MX2009003419A (es) 2009-04-09
US20080143013A1 (en) 2008-06-19
CN101563373A (zh) 2009-10-21

Similar Documents

Publication Publication Date Title
EP2853563B1 (de) Filme zur BOPP-Verarbeitung aus Polymeren mit hohem XS und hoher Schmelztemperatur
US6733898B2 (en) Resin compositions for producing biaxially oriented polypropylene films
US6358450B1 (en) Process for using sodium benzoate as a nucleating agent for monoaxially oriented polypropylene film
CN100363417C (zh) 丙烯聚合物组合物和由其制备的双向拉伸薄膜
CN101313026B (zh) 多峰聚丙烯聚合物组合物
US20100081760A1 (en) Film comprising a random copolymer with enhanced ethylene content
CN101535540A (zh) 用于制备高韧性纵切膜、单丝和纤维的树脂组合物
CN102361928A (zh) 多相共聚物的制备方法及其应用
DE602005003763T3 (de) Transparente leicht reissbare Folie
CN1075079C (zh) 聚丙烯薄膜及其制造方法
WO2008112116A1 (en) Resin compositions for producing biaxially oriented polypropylene films
EP0135253B1 (de) Verfahren zur Herstellung einer Zusammensetzung aus Polyäthylen mit sehr hohem Molekulargewicht
US7714070B2 (en) In-reactor produced polypropylene blends
US7745527B2 (en) Polyethylene-syndiotactic polypropylene composition and processing thereof
US7750081B2 (en) Random copolymer with enhanced ethylene content
CN114728463A (zh) 双轴取向管材
US20100081755A1 (en) Method for preparing a random copolymer with enhanced ethylene content
WO2021064178A1 (en) Biaxially oriented pipe
JP2022073267A (ja) プロピレン系重合体組成物、二軸延伸フィルム、および包装袋
EP2380926B1 (de) Vormischung zur Verbesserung der Steifheit und Transparenz eines zufälligen Propylencopolymers
JP6967073B2 (ja) Ｂｏｐｐに応用するためのポリプロピレン中の結晶度を下げる作用剤の使用
JP2021138424A (ja) 射出延伸ブロー成形体および容器
JP2016215646A (ja) ポリプロピレン成形体の製造方法、及びポリプロピレン成形体
JPH0420542A (ja) 空洞含有延伸成形物の製造方法
JP2633349C (de)

Legal Events

Date Code Title Description
AS Assignment

Owner name: FINA TECHNOLOGY, INC., TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHARDL JR., JOSPEH M.;KELLY, LU ANN;REEL/FRAME:018719/0825;SIGNING DATES FROM 20061204 TO 20061206

Owner name: FINA TECHNOLOGY, INC.,TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHARDL JR., JOSPEH M.;KELLY, LU ANN;SIGNING DATES FROM 20061204 TO 20061206;REEL/FRAME:018719/0825

AS Assignment

Owner name: FINA TECHNOLOGY, INC., TEXAS

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR NAME, PREVIOUSLY RECORDED AT REEL 018719, FRAME 0825;ASSIGNORS:SCHARDI, JR., JOSEPH M.;KELLY, LU ANN;REEL/FRAME:020531/0474;SIGNING DATES FROM 20061204 TO 20061206

Owner name: FINA TECHNOLOGY, INC.,TEXAS

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR NAME, PREVIOUSLY RECORDED AT REEL 018719, FRAME 0825;ASSIGNORS:SCHARDI, JR., JOSEPH M.;KELLY, LU ANN;SIGNING DATES FROM 20061204 TO 20061206;REEL/FRAME:020531/0474

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20140629